JP2014047021A - Roller conveyor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To thin an accumulation conveyor in the present invention, due to so far being difficult to thin the conveyor since a constitution is complicated from a request for arranging an electric motor and a driving belt for rotatingly driving these, under a large number of carrier rollers arranged in parallel, in the accumulation conveyor.SOLUTION: A power transmission part PW is formed for transmitting rotational power of a driving roller 15 to respective driven rollers 16 by extending a flat belt called a V-ribbed belt between the driving roller 15 incorporated with an electric motor M and the respective driven rollers 16-16 and between the driven rollers 16 and 16. Thus, since there is no need to arrange the electric motor and the driving belt under a carrier roller, a lower space of a roller conveyor can be made compact.

Description

  The present invention relates to a conveyor device in which a large number of transport rollers are arranged in parallel in the transport direction.

  In a roller conveyor device in which a large number of transport rollers are arranged in parallel in the transport direction at a fixed interval, the transport object is placed on a transport roller that actively rotates using an electric motor or the like as a drive source and transported horizontally, while the transport roller rotates A conveyor device called an accumulation conveyor is provided which can stop the operation and wait for a conveyed product to stay (stay) at a certain position. Techniques relating to this accumulation conveyor are disclosed in the following patent documents. The conventional accumulation conveyors disclosed in these patent documents are provided with a drive belt that circulates in the transport direction using an electric motor as a drive source along the lower side of a large number of transport rollers arranged in parallel. While pushing against each conveyance roller and transmitting the driving force (rotational torque) for conveyance to each conveyance roller, the drive belt is separated from each conveyance roller and each conveyance roller is stopped instantaneously by pressing the brake member. In addition, a configuration is provided in which the conveyed product is kept waiting at a target position.

Japanese Patent No. 3822094 Japanese Patent Laid-Open No. 7-2327 Japanese Patent Laid-Open No. 7-257717

As described above, the conventional accumulation conveyor arranges the driving belt along the lower side of the conveying roller, and further presses the electric motor, the driving belt and the brake member against each conveying roller as a driving source for rotating the driving belt. In this respect, it is necessary to provide a mechanism for separating the members, and in this respect, it is necessary to secure a space for arranging members and the like mainly below the transport rollers. .
The present invention has been made in order to solve the conventional problems, and an object thereof is to simplify the configuration of a roller conveyor device called an accumulation conveyor.

Said subject is solved by each following invention.
In the first aspect of the invention, a part of a plurality of transport rollers arranged in parallel in the transport direction is a drive roller that rotates positively with a drive motor inside, and the remainder is a driven roller that rotates by the rotational power of the drive roller. A transmission belt for transmitting rotational power is stretched between a roller and a drive roller, and the transmission belt is a roller conveyor device in which a grooved belt having a plurality of V-shaped grooves in the width direction is used. Each conveyance roller includes a cylindrical roller body, a roller shaft that rotatably supports the roller body with respect to the conveyor frame, and a bearing holder that holds a bearing that rotatably supports the roller body with respect to the roller shaft. The bearing holder integrally includes a pulley portion around which the transmission belt is stretched and a main body coupling portion with respect to the end portion of the roller main body, and the bearing is provided on the inner peripheral side of the pulley portion. A bearing holding hole is provided for holding, and a regulating projection is provided on the inner peripheral surface of the bearing holding hole to regulate the withdrawal of the bearing mounted in the bearing holding hole, and the bearing is formed by elastically deforming the regulating projection. It is a roller conveyor device that is pushed into the bearing holding hole.
According to the first aspect of the invention, since the drive motor is built in a part of the transport roller and used as the drive roller, there is no need to separately install an electric motor as a drive source below the transport roller. It is not necessary to secure a space for installing the electric motor below the transport roller, and the configuration can be simplified.
In addition, the configuration is such that each driven roller is rotated by directly passing a transmission belt between the drive roller and the electric motor, so that the drive belt that circulates along the lower side of the transport roller is omitted as in the prior art. In this respect as well, the configuration can be simplified and the space below the transport roller can be made compact. Furthermore, the conventional drive belt that presses against each conveying roller to transmit the rotational power can be omitted, so the mechanism for pressing the driving belt against the conveying roller and the mechanism for pressing the brake member are omitted. In this respect, the configuration can be further simplified, and the space below the transport roller can be made compact.

Further, the rotational power of the driving roller is transmitted to the driven roller via the transmission belt, and a grooved belt having a plurality of V-shaped groove portions in the belt width direction is used for the transmission belt. According to this grooved belt, the rotational power of the driving roller can be transmitted to the driven roller with higher transmission efficiency than a round belt having a circular cross section or a so-called sewing belt, and therefore more with one driving roller. This number of driven rollers can be rotated, and as a result, the conveyance direction area (one accumulation area) to be rotated and stopped for accumulation (stagnation) can be set wider. Accumulation can be performed with an appropriate gap without causing the conveyed product to collide with the conveyed product on the downstream side (zero pressure).
Further, according to the first invention, if the bearing is pushed into the bearing holding hole, the assembly work of the bearing to the bearing holder is completed. Therefore, the number of parts can be reduced as compared with a configuration using a separate retaining ring or the like. It is possible to improve the assembly of the bearing.
2nd invention is a roller conveyor apparatus arrange | positioned in the inner peripheral side of the transmission belt about the position of the roller axial direction of the bearing in a bearing holding hole in 1st invention.
According to the second aspect, since the position of the transmission belt and the bearing that rotatably supports the roller body on the roller shaft coincide with each other in the roller axial direction, the tension of the transmitted transmission belt is applied to the roller shaft. Therefore, it is possible to suppress the addition of a large bending external force, thereby suppressing the deflection of the roller shaft and maintaining the smooth rotation state of the conveying roller.
A third invention is a roller conveyor device according to the first or second invention, wherein a regulating sleeve portion that regulates displacement of the conveying roller in the approaching direction with respect to the conveyor frame is integrally provided on the inner ring of the bearing.
According to the third aspect of the invention, since the sleeve that is normally assembled as a separate member is provided integrally with the inner ring of the bearing, it is possible to improve the assembling performance while reducing the number of parts. Usually, the displacement of the bearings in the direction of approach to the conveyor frame is restricted to restrict the displacement of the conveying rollers in the roller axial direction, so that the interference of the conveying rollers with the conveyor frame is avoided. According to the sixth aspect of the present invention, since the sleeve is integrally provided as a restriction sleeve portion on the inner ring of the bearing, the number of parts is reduced and its assembling property is improved, and the same effect (conveyor of the conveying roller) is obtained. Interference avoidance for the frame) can be obtained.

According to a fourth invention, in any one of the first to third inventions, the end of the roller body is narrowed to a small diameter in accordance with the outer diameter of the main body coupling portion to form a drawing processing portion. This is a roller conveyor device in which a main body coupling portion is press-fitted to the peripheral side and a bearing holder is attached to an end of the roller main body.
According to the fourth invention, the main body coupling portion of the bearing holder is press-fitted into the drawing processing portion of the roller main body, and the main body coupling portion is further press-fitted into the drawing processing portion, so that the bearing holder is coupled to the end of the roller main body. Has been. The drawing portion of the roller body is reduced to a small diameter in accordance with the outer diameter of the main body coupling portion of the bearing holder. In this way, apart from the outer diameter or inner diameter (size) of the roller body, the end of the roller body is squeezed, and the inner diameter of the drawn portion is set according to the body coupling portion of the bearing holder. The bearing holder can be set as a common part for the main body.
5th invention is a roller conveyor apparatus which provided the escape groove part in the main body coupling | bond part of the bearing holder in the 4th invention over the perimeter.
According to the fifth aspect of the present invention, the relief groove is provided in the cylindrical body coupling portion that is press-fitted into the drawing portion of the roller main body. By escaping the generated fine dust and the like into the escape groove, it is possible to prevent the dust from being caught and to perform the reliable press-fitting, and thereby the bearing holder can be securely and firmly attached to the end of the roller body. it can.

1 is an overall plan view of a roller conveyor device according to an embodiment of the present invention. It is (II) arrow directional view of FIG. 1, Comprising: It is a front view of a retention area | region. FIG. 3 is a view as viewed in the direction of arrow (III) in FIG. It is a longitudinal cross-sectional view of a conveyance roller. It is an enlarged view of the power transmission part of a conveyance roller.

  Next, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a roller conveyor device 10 of the present embodiment. The roller conveyor device 10 forms a circulation-type conveyance path for conveying the conveyed objects W to W in the clockwise direction as indicated by white arrows in the drawing. In FIG. 1, symbol WI indicates a carry-in area for carrying the conveyed product W into the conveyance path, and symbol WO indicates a carry-out area for carrying the conveyed product W out of the conveyance path. The roller conveyor device 10 includes a stay region WS on the downstream side of the carry-in region WI. A shift area WF for switching the conveyance direction to the side (upward in the figure) is provided on the downstream side of the stay area WS. A swivel area WC constituting an arc-shaped transport path is arranged on the downstream side of the shift area WF, and a carry-out area WO is arranged on the downstream side thereof. A swivel area WR constituting a semi-circular conveyance path that reverses the conveyance path is arranged downstream of the carry-out area WO, and a carry-in area WI is arranged downstream thereof. Each conveyed product W carried in the carry-in area WI is subjected to various processes such as a packing operation through the carry-in area WI → the stay area WS → the shift area WF → the swivel area WC → the carry-out area WO → the swivel area WR. .

In each region WI, WS, WF, WC, WO, WR, a roller conveyor in which a large number of conveying rollers are arranged in parallel is used. In the swivel region WC and the swivel region WR, a tapered conveyance roller is used, and in the other regions WI, WS, WF, and WO, a straight conveyance roller is used. The transport rollers in each region WI, WS, WF, WC, WO, and WR are composed of a plurality of drive rollers that are positively rotated with a built-in electric motor and a plurality of driven rollers that are rotated by the rotational power of the drive rollers. . Hereinafter, the details will be described taking the staying region WS as an example.
The stay area WS is composed of three zone conveyors 11 to 13. The first zone conveyor 11 on the downstream side, the second zone conveyor 12 on the upstream side, and the third zone conveyor 13 on the upstream side constitute a stay region WS. As shown in FIG. 1, a pusher device PS for moving the conveyed product W to the shift area WF side is disposed on the first zone conveyor 11.
In each of the zone conveyors 11 to 13, zone sensors S <b> 1 to S <b> 3 for detecting the presence of the conveyed product W are arranged. Each zone conveyor 11-13 is started and stopped based on the output signals of the zone sensors S1-S3. When the conveyed product W1 is carried into the downstream zone 1, this is detected by the first zone sensor S1. In a state where the conveyed product W1 is loaded into the zone 1 and the first zone sensor S1 is turned on, the second zone conveyor 12 is stopped when the conveyed product W2 is loaded into the zone 2 and the second zone sensor S2 is turned on. . Thereby, the conveyed product W2 waits in the zone 2 and is not carried into the zone 1, and as a result, a collision with the conveyed product W1 in the zone 1 is avoided.
In a state where the conveyed product W is loaded into the zone 2 and the second zone sensor S2 is turned on, the third zone conveyor 13 is stopped when the conveyed product W3 is loaded into the zone 3 and the third zone sensor S3 is turned on. . As a result, the conveyed product W3 waits in the zone 3 and is not carried into the zone 2, thereby avoiding a collision with the conveyed product W2 in the zone 2.
As described above, in the state where the conveyed product is present in the downstream zone, the upstream zone conveyor is stopped when the conveyed product is carried into the upstream zone, thereby avoiding collision between the conveyed items. It has come to be. As will be described later, each of the first to third zone conveyors 11 to 13 includes a total of ten transport rollers, and has a very long transport distance. For this reason, as shown in FIG. 2, the transported objects W <b> 1 to W <b> 3 that are waiting in the zones 1 to 3 are placed on standby with a large space SP therebetween, and even relatively large transported objects collide with each other. Without waiting.

Each zone conveyor 11-13 is provided with one drive roller 15 and nine driven rollers 16-16, respectively. In FIG. 2, a hollow arrow direction from the right side to the left side is a conveyance direction of the conveyance object W.
In each of the zone conveyors 11 to 13, five driven rollers 16 to 16 are arranged on the upstream side in the conveying direction of the driving roller 15, and four driven rollers 16 to 16 are arranged on the downstream side in the conveying direction.
As shown in FIG. 4, the drive roller 15 uses an electric motor M as a drive source inside a cylindrical roller body 15a. The roller body 15a is positively rotated by the electric motor M. The roller body 15a is rotatably supported via a roller shaft 15b. Both end portions of the roller shaft 15 b are supported on the left and right side portions of the conveyor frame 17. Since this motor built-in type conveyance roller is known, detailed description thereof will be omitted.
Similarly, as shown in FIG. 4, each driven roller 16 includes a cylindrical roller body 16 a and a roller shaft 16 b that rotatably supports the roller body 16 a. Both end portions of the roller shaft 16 b are also supported on the left and right side portions of the conveyor frame 17. A bearing 21 is attached via a bearing holder 20 to an end portion on the left side (left end portion in FIG. 4) in the transport direction of the roller body 16a. A bearing 23 is attached via a holder plate 22 to the right end (right end in FIG. 4) of the roller body 16a in the conveying direction. The roller body 16a is supported through the left and right bearings 21 and 23 so as to be rotatable around the axis with respect to the roller shaft 16b.

As shown in FIG. 3, a power transmission unit PW for transmitting rotational power to the left end of each drive roller 15 and the left ends of the driven rollers 16 to 16 is provided. The power transmission unit PW mainly includes a belt transmission mechanism. As shown in FIGS. 4 and 5, each bearing holder 20 is a resin molded part, and integrally includes a pulley portion 20a and a main body coupling portion 20b. The pulley portion 20a is a so-called V-ribbed pulley corresponding to the following V-ribbed belt, and a plurality of V-shaped grooves 20c to 20c are formed on the outer peripheral surface thereof. In the present embodiment, each of the pulley portions 20a is provided with nine groove portions 20c to 20c.
Two endless transmission belts 24, 24 are hung on each pulley portion 20a. One transmission belt 24 is stretched over the downstream pulley portion 20a, and the other transmission belt 24 is stretched over the upstream pulley portion 20a. Thereby, the rotational power of the drive roller 15 is transmitted to the four driven rollers 16 to 16 on the downstream side and the five driven rollers 16 to 16 on the upstream side.
A flat belt with a groove called a so-called V-ribbed belt is used for each transmission belt. In the present embodiment, two groove portions (three chevron convex portions) are arranged in parallel on the inner circumferential surface in the belt width direction. A transmission belt 24 is stretched between adjacent pulley portions 20a and 20a in a state where a plurality of groove portions and a mountain-shaped protrusion are engaged with each other in the belt width direction. The grooved transmission belts 24 to 24 transmit the rotational power of the driving roller 15 to the downstream and upstream driven rollers 16 very efficiently by the high frictional force. Further, by realizing a high transmission efficiency using the plurality of grooved belts (transmission belts 24 to 24), it is possible to rotate each conveyance roller at a higher speed and increase the conveyance speed. In the present embodiment, the conveyance speed can be set to 120 meters per minute, for example.

A bearing holding hole 20 d for holding the bearing 21 is provided on the inner peripheral side of the pulley portion 20 a of each bearing holder 20. The bearing 21 held in the bearing holding hole 20d is held on the inner peripheral side of the pulley portion 20a. For this reason, the tension of the two transmission belts 24, 24 hung on the pulley portion 20a is directly received by the bearing 21, so that it does not act as a bending external force on the bearing holder 20 and thus the roller bodies 15a, 16a.
The bearing 21 is prevented from coming out of the bearing holding hole 20d by the restricting protrusions 20e to 20e. The restricting protrusions 20e to 20e are integrally formed on the inner peripheral surface of the bearing holding hole 20d when the bearing holder 20 is formed. In the present embodiment, eight restricting protrusions 20e to 20e are provided at eight equal positions in the circumferential direction. The bearing 21 is assembled by being pushed into the bearing holding hole 20d while elastically crushing the restricting protrusions 20e to 20e. The bearing 21 is assembled in a state of being sandwiched between the restricting protrusions 20e to 20e and the ribs 20f to 20f provided integrally in the bearing holding hole 20d, and thereby in the bearing holding hole 20d. The axial displacement is maintained in a regulated state.
According to the restricting protrusions 20e to 20e, it is possible to reduce the number of parts and simplify the work of assembling the bearing 21 as compared with the configuration in which the retaining ring is restricted using a separate retaining ring.
A regulation sleeve portion 21 a is integrally provided on the inner ring of the bearing 21. The restriction sleeve portion 21 a protrudes from the bearing holding hole 20 d and comes into contact with the side portion of the conveyor frame 17. When the regulating sleeve portion 21a is brought into contact with the side portion of the conveyor frame 17, the displacement of the driving roller 15 and the driven rollers 16 to 16 in the roller axis direction (left and right direction in FIG. 5) is regulated. The same restriction can be performed by preparing a restriction sleeve having the displacement restriction function as a separate part from the bearing 21, but the number of parts can be reduced by using the bearing 21 with the restriction sleeve portion 21a as illustrated. As a result, the assembly work of the driving roller 15 and the driven rollers 16 to 16 can be simplified.

End portions of the roller main bodies 15 a and 16 a are coupled to the main body coupling portion 20 b of each bearing holder 20. The left end portions of the roller main bodies 15a and 16a are crimped and coupled to the main body coupling portion 20b. As shown in the drawing, the left end portions of the roller bodies 15a and 16a are drawn to a small diameter. By drawing the left end portion to a constant diameter, the bearing holder 20 can be made into a common part regardless of the diameter (size) of the roller body.
The main body coupling portion 20b is formed in a tapered shape that inclines in a direction of a smaller diameter toward the right end side. The taper portion 20g functions as a guide portion when inserted into the inner peripheral side of the drawing portions 15c and 16c of the roller bodies 15a and 16a.
On the left side of the tapered portion 20g, a press-fit portion 20h whose diameter does not change is provided. The press-fit portion 20h is press-fitted into the drawing portions 15c and 16c, and the bearing holder 20 is assembled to the left end portions of the roller bodies 15a and 16a. On the left side of the press-fit portion 20h, an escape groove portion 20i is provided over the entire circumference. The relief groove 20i functions as a space for accommodating foreign matter such as dust adhering to the press-fitting portion 20h or the inner peripheral surfaces of the drawing portions 15c and 16c, or scraps of the press-fitting portion 20h generated by press-fitting. The relief grooves 20i prevent the foreign bodies from being caught between the press-fitting portions 20h when the press-fitting portions 20h are press-fitted into the drawing portions 15c and 16c of the roller main bodies 15a and 16a, and the drawing portions of the roller main bodies 15a and 16a. The bearing holder 20 can be reliably fixed to 15c, 16c.
A flange portion 20j is provided on the left side of the escape groove portion 20i. The bearing holder 20 is assembled to the left end portions of the roller bodies 15 and 16 by abutting the left end portions of the drawn portions 15c and 16c against the flange portion 20j and caulking.
As shown in FIG. 5, an upper cover portion 17a is provided on the upper portion of the left conveyor frame 17 so as to protrude sideways. The upper cover portion 17a covers the pulley portions 20a to 20a of all the bearing holders 20 to 20 and the upper portions of all the transmission belts 24 to 24 (power transmission portions PW) stretched over them to prevent dust and prevent foreign matter. Interference is prevented. Further, a side cover 25 is attached between the overhanging front end portion of the upper cover 17 a and the conveyor frame 17. The side cover 25 and the conveyor frame 17 shield the pulley parts 20a to 20a and the transmission belts 24 to 24 (power transmission part PW) on both the left and right sides, so that adhesion of dust and the like and interference of foreign matters can be avoided more reliably. It is like that.

According to the roller conveyor device 10 of the present embodiment configured as described above, since the drive motor M is built in a part of the transport roller and serves as the drive roller 15, the electric motor as a drive source is used as the transport roller. There is no need to attach externally to the bottom. For this reason, it is not necessary to secure a space for installing the electric motor below the conveying rollers (the driving roller 15 and the driven rollers 16 to 16), and the configuration can be simplified.
Further, since the configuration is such that each driven roller 16 is rotated by directly passing the transmission belt 24 between the drive roller 15 having the electric motor M built therein, a drive belt that circulates along these lower portions as in the prior art, In addition, the mechanism for pressing the drive belt against the conveying roller and the mechanism for pressing the brake member can be omitted. In this respect, the configuration can be simplified and the space below the conveying roller can be reduced. it can.
Further, the rotational power of the drive roller 15 is transmitted to the driven rollers 16 to 16 through the transmission belts 24 to 24, and the transmission belts 24 to 24 are provided with a plurality of V-shaped grooves in the belt width direction. A belt with a belt is used. According to this grooved belt, the rotational power of the driving roller 15 can be transmitted to the driven rollers 16 to 16 with higher transmission efficiency than a round belt having a circular cross section or a so-called sewing belt, so that one drive A larger number of driven rollers 16 to 16 can be rotationally driven by the roller 15, whereby the first to third zone conveyors 11 to 13 of the present embodiment are set long in the transport direction. The first to third zone conveyors 11 to 13 are set to be longer in the transport direction, and the transport direction area (zones 1 to 3) to be rotated and stopped for accumulation (retention) can be set wider. Thereby, it is possible to accumulate the large transported objects W1 to W3 with an appropriate clearance SP without colliding with the downstream transported object W1 (zero pressure).

A left bearing 21 that rotatably supports the roller main bodies 15a and 16a with respect to the roller shafts 15b and 16b is disposed on the inner peripheral side of the transmission belt 24 with respect to the axial position of the roller shafts 15b and 16b. For this reason, it is possible to suppress the tension of the transmitted transmission belt 24 from being applied as a large bending external force to the roller shafts 15b and 16b, thereby suppressing the deflection of the roller shafts 15b and 16b. The smooth rotation state of the driving roller 15 and the driven rollers 16 to 16 can be maintained.
Further, the bearing holder 20 is integrally provided with a main body coupling portion 20b for coupling the end portions of the roller main bodies 15a and 16a. The roller main body is matched to the outer diameter of the press-fit portion 20h of the main body coupling portion 20b. The ends of 15a and 16a are narrowed to a small diameter to be drawn portions 15c and 16c. The main body coupling portion 20b is press-fitted into the inner peripheral sides of the drawing portions 15c and 16c, and the bearing holders 20 are attached to the end portions of the roller main bodies 15a and 16a by caulking. Thus, apart from the outer diameters or inner diameters (sizes) of the roller bodies 15a, 16a, the ends thereof are squeezed so that the inner diameters of the drawing parts 15c, 16c are the outer diameters (press-fit diameters) of the body coupling part 20b of the bearing holder 20. Therefore, the bearing holder 20 can be set as a common component for roller bodies of various sizes.
Further, according to the relief groove 20i provided in the bearing holder 20, the press-fit portion 20h is securely press-fitted into the drawing portions 15c and 16c of the roller bodies 15a and 16a by releasing fine dust generated by press-fitting, The bearing holder 20 can be firmly attached to the end portions of the roller main bodies 15a and 16a, whereby the durability of the roller conveyor device 10 can be enhanced.
Further, the withdrawal of the bearing 21 is restricted by the restriction protrusions 20e to 20e provided in the bearing holding hole 20d of the bearing holder 20. If the bearing 21 is pushed into the bearing holding hole 20d while elastically deforming the restricting protrusions 20e to 20e, the assembly work of the bearing 21 to the bearing holder 20 is completed. Thus, it is possible to improve the assembling property of the bearing 21 while reducing the number of parts.
Further, since the sleeve that is normally assembled as a separate member is integrally provided as the restriction sleeve portion 21a on the inner ring of the bearing 21, the assembly performance can be improved while reducing the number of parts. The restriction sleeve portion 21a restricts the displacement of the bearing 21 in the approaching direction to the conveyor frame 17, thereby restricting the displacement of the conveying rollers (the driving roller 15 and the driven rollers 16 to 16) in the roller axial direction. Interference with the conveyor frame 17 is avoided.

Various modifications can be made to the embodiment described above. For example, in the first to third zone conveyors 11 to 13, the configuration in which each of the nine driven rollers 16 to 16 is driven by one drive roller 15 is illustrated, but more driven by the one drive roller 15. Alternatively, the rollers 16 to 16 may be driven, and the driven rollers 16 to 16 having a smaller number may be driven to rotate. By realizing a high transmission efficiency using a plurality of grooved belts (transmission belts 24 to 24) as in this example, for example, each of the drive rollers 15 has 15 on the downstream side and on the upstream side. A single zone conveyor can be configured by arranging 16 driven rollers (a total of 30 driven rollers) 16 to 16.
Moreover, it is good also as a structure which spreads a wider transmission belt with respect to the pulley part 20a of each bearing holder 20, and transmits rotational power with higher efficiency. Rotating power can be transmitted to the driven roller 16 side more efficiently by engaging a larger number of V-grooves with the pulley portion 20a using a wider transmission belt. can do.
The various configurations illustrated are not limited to straight conveyance paths, and can be similarly applied to arc-shaped conveyance paths (turning regions WC and WR).

W, W1, W2, W3 ... Conveyed object WI ... Loading area WO ... Unloading area WS ... Retention area WF ... Shift area WC, WR ... Turning area PS ... Pusher device 10 ... Roller conveyor device 11 ... First zone conveyor S1 ... First 1 zone sensor 12 ... 2nd zone conveyor S2 ... 2nd zone sensor 13 ... 3rd zone conveyor S3 ... 3rd zone sensor 15 ... Drive roller (conveyance roller)
M ... Electric motor, 15a ... Roller body, 15b ... Roller shaft, 15c ... Drawing part 16 ... Driven roller (conveyance roller)
16a ... Roller body, 16b ... Roller shaft, 16c ... Drawing part 17 ... Conveyor frame, 17a ... Upper cover part PW ... Power transmission part 20 ... Bearing holder 20a ... Pulley part (V-ribbed pulley), 20b ... Body coupling part, 20c ... groove 20d ... bearing holding hole, 20e ... regulating projection, 20f ... rib, 20g ... taper 20h ... press-fitting part, 20i ... relief groove, 20j ... flange 21 ... bearing, 21a ... regulating sleeve 23 ... bearing 24 ... Transmission belt (V-ribbed belt)
25 ... Side cover

Claims (5)

A part of a plurality of transport rollers arranged in parallel in the transport direction is a drive roller that is positively rotated with a drive motor incorporated therein, and the remaining is a driven roller that is rotated by the rotational power of the drive roller, and the driven roller and the drive A roller conveyor device in which a transmission belt for transmitting the rotational power is stretched between rollers, and a grooved belt having a plurality of V-shaped groove portions in the width direction is used for the transmission belt. ,
Each of the transport rollers includes a cylindrical roller body, a roller shaft that rotatably supports the roller body with respect to the conveyor frame, and a bearing holder that holds a bearing that rotatably supports the roller body with respect to the roller shaft. With
The bearing holder integrally includes a pulley portion on which the transmission belt is stretched and a main body coupling portion with respect to an end portion of the roller main body, and a bearing for holding the bearing on the inner peripheral side of the pulley portion. A holding hole is provided, and a restricting protrusion is provided on the inner peripheral surface of the bearing holding hole to restrict the bearing mounted in the bearing holding hole, and the restricting protrusion is elastically deformed so that the bearing is the bearing. A roller conveyor device that is pushed into the holding hole and mounted. The roller conveyor apparatus according to claim 1, wherein a position of the bearing in the bearing holding hole in the roller axial direction is arranged on an inner peripheral side of the transmission belt. 3. The roller conveyor device according to claim 1, wherein a regulating sleeve portion that regulates displacement of the conveying roller in the approach direction with respect to the conveyor frame is integrally provided on an inner ring of the bearing. The roller conveyor device according to any one of claims 1 to 3, wherein an end portion of the roller main body is narrowed to a small diameter according to an outer diameter of the main body coupling portion to form a drawing portion. A roller conveyor device in which the main body coupling portion is press-fitted into an inner peripheral side of a processing portion and a bearing holder is attached to an end portion of the roller main body. The roller conveyor device according to claim 4, wherein a relief groove is provided over the entire circumference in a main body coupling portion of the bearing holder.

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